feat(ebooks): Add tvl-ebooks code r/1822

Change-Id: If519e789a91fbf427373daa383c6ae00ba5e0b6c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2007
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>

1 files changed, 26 insertions, 0 deletions

diff --git a/fun/tvl-ebooks/make-v6/main.go b/fun/tvl-ebooks/make-v6/main.go
new file mode 100644
index 000000000000..6d4d0047bbac
--- /dev/null
+++ b/fun/tvl-ebooks/make-v6/main.go
@@ -0,0 +1,26 @@
+package main
+
+import (
+	"crypto/rand"
+	"log"
+	"net"
+)
+
+func main() {
+	// 2a0c:2f07:29:9999:6564:5298:8413:4652
+	ip := net.ParseIP("2a0c:2f07:29::")
+
+	rand.Read(ip[6:])
+
+	if ip[7] > 0xaa {
+		ip[4] = 0x03
+		ip[5] = 0x84
+		if ip[7] > 0xdd {
+			ip[4] = 0x08
+			ip[5] = 0x64
+		}
+	}
+
+	log.Printf("%s\n", ip)
+	//
+}